1. Soak eggs in 1 cup water & 1/3 cup strong vinegar for 30 minutes (in glass jar/bowl)
2. Wash the eggshells with the vinegar solution (to wash calcium off eggshells & make them smooth)
3. Take out and coat eggs with salt
4. Let salt-coated eggs sit in a covered glass jar for 7-10 days (at room temp)
5. After 7-10 days, when ready to eat, boil eggs for about 10 minutes
6. Eat with chao or make in fried rice